beckwith



No. 6l3,230. Patented Nov. 1, I898. F. W. BECKWITH.

W R E N G H (Applieatinn filed Nov. 4, 1897.)

(No Model.)

VIN VEN TOE"! M ITNESSES' v FRANK )4. BEG/(WITH @a/W HwJrmRA/Ews.

UNITED STATES PATENT OFFICE.

FRANK W. BECKWITH, OF CHICAGO, ILLINOIS, ASSIGNOR TO HIMSELF AND HENRY W. FAIRBANKS, OF SAME PLACE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 613,230, dated November 1, 1898.

Application filed November 4,1897. Serial No. 657 353- CN'o model.)

To all whom it may concern:

Be it known that I, FRANK W. BECKWITH, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Wrenches, of which the following is a specification.

This invention has for its object the provision of means whereby the movable jaw of wrenches having end jaws, one of which is adjustable, may be retained in any adjusted position as long as desired and whereby the tendency of the jaw to lose its adjustment is wholly or mainly overcome.

The nature of the invention will be fully understood from the drawings and the description given below.

The accompanying drawings show at Figure 1 a side and at Fig. 2 an edge view of my improved wrench.

In said drawings, A represents the handle, and B the stationary jaw, of the wrench. These two parts may be made in one piece, if desired. 7

C is the movable jaw. It carries a guide C,- passing through the stationary jaw, and is itself provided with an opening adapted to permit it to move along a second guide B, attached to the stationary jaw and arranged parallel to guide C. Between the guides is the adjusting-screw D, fast at one end in the jaw B and provided with the usual adjusting-nut E, having a flange E working in a notch E in the overhanging part of the movable jaw. The handle has an extended straight bearing-surface A, adapted to assist in guiding the jaw C in its movements and to afford said jaw an abutment which will as= sist it in resisting the strains put upon it in use.

A lock-nut, acting to prevent loss of ad justment, is shown at F. It is placed upon the screw D between the stationary and the movable jaw, so it may be turned up against the latter and clamp it rigidly against the adj usting-nut. The stationary jaw is recessed or bowed outward, as seen at A to give room to this nut when the wrench is adjusted for small work. By means of this nut the movable jaw is rendered firm, and the ease with which its adjustment has heretofore been lost is overcome. Any looseness of the adj usting-nut may also be taken up by the lock-nut.

I claim- 1. The wrench having end jaws B and C, one of which is adjust-able, and also having an'adjusting-screw provided with both an ad= justing-nut E and a lock=nut F, the stem of one of the jaws being bowed or recessed to make room for the lock-nut, substantially as specified.

2.- The adjustable end wrench consisting of the handle, the stationary jaw having a guide B, the movable jaw carrying a guide C and the adj Listing-screw provided with both an adj listing-nut E and a lock-nut F, the stem of one of the jaws being recessed or bowed to give room to the lock-nut, substantially as specified.

FRANK W. BECKWITH.

Witnesses:

E. S. EVARTS, L. E. CURTIS. 

